Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f6466a57f4b3eee1dac6e593bcc454510fc1f84db50ee8728bcb8b4bb09a5003' 
  AND token = 'jHZSi01BfwRe97GDVmg5HNYJSYjBJpwK5p1tKdfcQ48=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}